Question

what is the value of n?

Explanation:

Step1: Identify angle - relationship

The large angle is composed of two smaller angles. One is $n$ and the other is $30^{\circ}$, and their sum is $70^{\circ}$.

Step2: Set up equation

We can write the equation $n + 30^{\circ}=70^{\circ}$.

Step3: Solve for $n$

Subtract $30^{\circ}$ from both sides of the equation: $n=70^{\circ}- 30^{\circ}$.

Answer:

$40^{\circ}$